Before u go to expensive therapy, I suggest the following cause my son has the same problem:
1) U can get a free assessment fr the govt baby clinic. Waiting time is around 1 month.
2) Govt therapy is cheaper than private
3) Encourage him to speak in a full sentence at home before he can get what he wants
BTW, if both parents are working, does someone speak to him in Cantonese during the day time? Cause having a Phil maid makes learning to speak delayed.